Overview
The node "OpenAI Image Generator" enables users to generate images from text prompts using OpenAI's DALL-E models. It supports generating new images based on descriptive text and creating variations of existing images. This node is useful in scenarios such as creative content generation, marketing material creation, prototyping visual ideas, or enhancing digital art workflows.
For example, a user can input a prompt like "a futuristic cityscape at sunset" and receive one or multiple AI-generated images matching that description. Alternatively, the user can provide an existing image and request variations with different styles or qualities.
Properties
| Name | Meaning |
|---|---|
| Prompt | A text description of the desired image(s) to be generated. |
| Model | The DALL-E model to use for image generation: either "DALL-E 3" or "DALL-E 2". |
| Size | The resolution of the generated images. Options include: "1024x1024", "1024x1792", "1792x1024", "256x256", "512x512". |
| Quality | (Only for DALL-E 3) The quality level of the generated image: "Standard" or "HD". |
| Style | (Only for DALL-E 3) The style of the generated images: "Vivid" or "Natural". |
| Number of Images | The number of images to generate, between 1 and 10. |
| Response Format | The format in which the generated images are returned: either as URLs ("URL") or Base64-encoded JSON ("Base64 JSON"). |
Output
The output contains a JSON array where each item corresponds to a generated image. Each image object includes either:
- A URL pointing to the generated image if the response format is set to "URL".
- A Base64-encoded JSON string representing the image data if the response format is "Base64 JSON".
This allows downstream nodes or workflows to either download the image from the URL or process the image data directly.
If the operation was to create image variations (not requested here), the output would similarly contain the generated variation images in the chosen format.
Dependencies
- Requires an API key credential for authenticating with OpenAI's API.
- The node makes HTTP POST requests to OpenAI's image generation endpoints:
https://api.openai.com/v1/images/generationsfor generating images.
- Optional: An organization ID header can be included if provided in credentials.
- No additional external dependencies beyond standard HTTP request capabilities.
Troubleshooting
- Missing or invalid API key: The node requires a valid API key credential. Errors related to authentication indicate missing or incorrect keys.
- Invalid prompt or parameters: Ensure the prompt is not empty and parameters like size and number of images are within allowed ranges.
- Binary data errors (for variations): If creating variations, the specified binary property must exist and contain valid image data.
- API rate limits or quota exceeded: OpenAI may limit usage; handle errors by checking account limits.
- Network issues: Connectivity problems will cause request failures; verify network access to OpenAI endpoints.